Simple Solutions That Work! Issue 6

Coatings can help generate longer tool life in the manufacturing world. All coatings have their benefits in unique ways. Coating a metal wear part could help with strength, lubricity, corrosion resistance and even tolerance issues. Treating a tool is an added benefit that usually does not have drawbacks. Each applicator has a defined proprietary solution or process that creates their success. One of the most important things to consider when evaluating a coating is the base material of the tool itself. Most coatings are only as good as the base material that they are applied to. Tensile strength, coefficient of friction, corrosion resistance, erosion resistance and even surface finish all play a critical role in successfully generating the most economical tool life. Coating temperature is also a need thought when evaluating which surface treatment is best for you. A hot coating process can distort tolerances which then require post plating operations. Coatings are not a replacement for the heat treating of parts but it creates an added layer of surface hardness. When considering a coating, evaluate wear and if there is absolute adhesion or if it might wear irregularly. All plating is a trade-off. While some forms of plating/coating will lend themselves to solving specific functions or engineering needs (i.e. wear, lubricity), they may not be suitable for other conditions in similar environments. It is important to consider the total environment, level of cost effectiveness, the function of the part, and then choose a surface treatment that effectively addresses the greatest number of these conditions. CHRIS NEELY Vice President of Sales ARMOLOY ARTICLE TAKEAWAYS: • Guide to coatings for ferrous and non-ferrous metals • Coatings help parts last longer • Understand your base material to select the correct coating SYSTEMS INTEGRATION 54 UNDERSTANDING METAL COATINGS